Your car has a temperature gauge to show the temperature of your engine. You can know when the coolant in your car engine is at high temperature, cold, or in normal conditions. Sometimes, you may see that the car temperature gauge stays on cold. And this might be an issue for you. This occurs because of several reasons. After reading this article, you will be able to know the reasons to car temperature gauge stays cold. Also, we will give you processes and options on how to fix that issue and all other answers to your questions.
What is a Car Temperature Gauge and How does It Work?
The car temperature gauge is the thing that tells us the temperature of the coolant in the engine.
You can see the indicator for the car temperature gauge on the dashboard of the car. This also offers an early warning if your car engine is overheating or over-cooling.
There is a sensor in the temperature gauge that gathers data on the temperature of the car’s engine.
It can be found in or near the thermostat housing. The data collected through the sensor is transmitted to the internal computer of the vehicle as an electrical signal. Then the processed data or information will display on the temperature indicator on the dashboard. This will give you an accurate reading of the temperature of the engine.
Providing this information on temperature is a great thing, as the vehicle owner or the driver can take early precautions without damaging the car.
You can change the thermostat or block part of the radiator as a preventive method.
What are the Common Causes of a Car Temperature Gauge Staying on Cold?
The temperature gauge indicates cold until your car travels a short distance or runs the engine for some time. But if the indicator remains on the cold sign after the warming up of the engine, there might be an issue.
Most commonly following are the reasons for this happen:
- Your temperature gauge is at fault. It is because the gauge might be broken. If this happens, you must replace the entire gauge with a new one. And you should program it after replacing it.
- Check if there are any faults in the sensor. This can be done by using multimeters, but you need to know the accurate values that the sensor should have. Find more on how to do it manually by yourself if you don’t need help from a professional.
- Broken wires are another problem, and if that happens, the sensor signal will not be able to transmit accurately.
- Corrosions in plug connectors can also indicate the car temperature gauge on cold always.
- Also, a bad thermostat, the air in the cooling system, and a broken engine control unit can be reasons for this issue.
How Can I Diagnose the Problem?
If the car temperature gauge stays cold, you might need an Ohm-meter or a multi-meter to diagnose the above problems.
You can check whether the gauge or the cluster is at fault by using an ohm meter. If you are not knowledgeable enough to do it, contact a mechanic or bring the car to an expert.
The faults in the sensors can be detected by measuring with a multi-meter. When measuring, you also need to know the accurate values that it should have.
To check the broken wires, you can use a multi-meter and measure the resistance of all the directions of the wires. Connectors might be corroded, and to diagnose that, clean and put or spray electronic cleaner on all the connectors, including connectors at the engine control unit (ECU), sensor, and cluster. If corrosive marks appear, you have to repair or replace the relevant connectors.
If you think there might be air in the engine’s coolant system, you must bleed it using a special technique in bleeding, such as vacuuming. Finally, to diagnose any issue in the engine control unit, it is necessary to examine the trouble codes using a scanner (OBD2) to see if the ECU gets information about temperature.
Since some of these methods require electronic car knowledge and mechanical knowledge, it is best if you seek professional help, get advice from them or get help from a mechanic.
How Can I Fix a Car Temperature Gauge that Stays on Cold?
First, find the radiator cap and firmly close it. Ensure that it is properly installed and tightened securely. And then, start the car engine for a short while and check whether the car temperature gauge is rising its level from cold to normal. If not, you should diagnose the issue as mentioned previously.
If there are issues with the gauge, sensor, wires, and connectors, take necessary actions to fix them, like repairing, replacing with new ones, or adjusting by removing and fixing them again.
The same goes for a bad thermostat. When fixing the wires, you should take a look at the wiring diagram of your car.
Therefore, it is better to get professional help if you need to repair or replace the wire, connectors, faulty clusters, sensors, etc.
When you bring the car to an expert, they will diagnose the problem with your car and tell you what to do to fix the issue. Though it costs a bit, it is better than trying to diagnose and fix the issues by yourself. Because it ensures not happening same issues for a longer period of time.
Can I Drive my Car with a Cold Temperature Gauge?
Yes, it is OK, but not for long! It is not a good thing for the car and for the driver as well. Imagine that the engine is overheated without your knowledge.
It might cause damage to the vehicle. The oil will burn, and the parts of the engine will lose integrity. So, to avoid overheating and overcooling of the engine, you should fix the issue as soon as possible.
How Can I Prevent a Car Temperature Gauge from Staying on Cold?
You should maintain the car with care and examine the engine parts often for any issues.
Frequently check the coolant levels and check if there are air bubbles in the coolant blocking coolant from flowing.
Regular maintenance is necessary. And also, after you have fixed the issues, get advice from the mechanic or from professionals on how to prevent this issue from happening in the future.
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